What is empty space? : the physics of dark energycblake/Blake_Shinedome.pdf · Our current model of...
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What is empty space? : the physics of dark energy Chris Blake (Swinburne University)
Transcript of What is empty space? : the physics of dark energycblake/Blake_Shinedome.pdf · Our current model of...
What is empty space? :the physics of dark energy
Chris Blake(Swinburne University)
Our current model of cosmology
Earth Solar system
Milky WayLocal group
Local cluster
The Universe
Our place in the Universe
No such thing as nothing : the Casimir effect
What does a cosmologist do?
09/27/2006 01:06 PMScience Cartoons Plus -- The Cartoons of S. Harris
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S. Harris Astronomy Cartoons
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Copyright © 2006 by Sidney Harris. No reproduction other than for personal enjoyment without written permission.
Our current picture of the Universe
The Universe is expanding ...
... and the expansion is speeding up ! ...
... driven by an unknown “dark energy”
My research : galaxy maps
Making the map : redshift
Australia is a world-leader in this science !
Our observations
You arehere
Our result : new evidence for dark energy
After 5 years of work ...
Is dark energy the quantum vacuum energy?
Measured dark energy density = 10-26 kg m-3
Predicted vacuum energy density = 10+96 kg m-3
“The worst prediction in the history of physics”
In that case , what is dark energy?
New laws of gravity?
Extra dimensions? New cosmic materials?
Good prospects for the future
Square Kilometre Array radio telescope ...
Thank you ...
